Somebody should have told you this before, but without any business/tax background you will be untrustworhy to every bank, especially here in Poland, where AML policies are insane these days. I am Polish resident right now and have a business here. Recently one of a banks I use asked me about nature of some transactions with some of my clients and for tons of other shi...t like tax returns.
I have given them all I had as I dont have anything to hide, they wished me good day and continued servicing me, but IMHO this has gone too far if the bank asks people about︀ annual turnover below 25k EUR about nature of their business relations.